US5299885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized porous pipe
Assignee: Tekni Plex Inc
•
Filing: 1992-08-14
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Granted: 1994-04-05
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Expires: 2012-08-14
Abstract
Abstract Porous pipe formed of particles of vulcanized rubber dispersed in a binder resin such as polyethylene are stabilized to reduce degradation by ultraviolet light by dispersing in the binder resin an effective amount of an ultraviolet stabilizer such as 0.1 to 10% by weight of carbon black.
Inventors
- 👤 Thomas N. Prassas
- 👤 Shannon Bard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:09
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; B; B29; B29C; B29C48/00; B29C48/022; E; E02; E02B; E02B11/00; E02B11/005; B29C48/001; B29C48/0012; B29C48/03; B29C48/04; B29C48/09; B29C48/10; B29K; B29K2021/00; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/0608; B29K2023/0625; B29K2105/00; B29K2105/0005; B29K2105/0044; B29K2105/04; B29K2105/25; B29K2105/251; B29K2503/00; B29K2707/00; B29K2707/04; B29K2995/00; B29K2995/0037; B29K2995/0068; B29L; B29L2023/00; B29L2023/003; B29L2023/22; C08J2323/00; C08J2323/02; C08J2421/00; Y; Y10; Y10S; Y10S138/00; Y10S138/07
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
81 words
Porous pipe comprising a hollow pipe having a pipe wall containing pores, said pipe wall being formed of a thermoplastic binder resin selected from a polyolefin resin or a vinyl resin containing a dispersion of 60% to 80% by weight of vulcanized elastomer particles and said binder resin containing 0.1% to 10% by weight of an ultraviolet stabilizer based on the weight of the pipe in an amount effective to substantially reduce degradation of the binder resin due to ultraviolet radiation.
Claim 2
Dependent Claim
81 words
Porous pipe comprising a hollow pipe having a pipe wall containing pores, said pipe wall being formed of a thermoplastic binder resin selected from a polyolefin resin or a vinyl resin containing a dispersion of 60% to 80% by weight of vulcanized elastomer particles and said binder resin containing 0.1% to 10% by weight of an ultraviolet stabilizer based on the weight of the pipe in an amount effective to substantially reduce degradation of the binder resin due to ultraviolet radiation.
Claim 3
Dependent Claim
13 words
Porous pipe according to claim 1 in which the elastomer particles are vulcanized.
Claim 4
Dependent Claim
22 words
Porous pipe according to claim 2 in which the elastomer particles are present in an amount from 60% to 70% by weight.
Claim 5
Dependent Claim
22 words
Porous pipe according to claim 1 in which the elastomer particles are present in an amount from 63% to 67% by weight.
Claim 6
Dependent Claim
14 words
Porous pipe according to claim 4 in which the elastomer particles are uniformly sized.
Claim 7
Dependent Claim
15 words
Porous pipe according to Clam 5 in which the particles pass a 30 mesh screen.
Claim 8
Dependent Claim
15 words
Porous pipe according to Clam 5 in which the particles pass a 30 mesh screen.
Claim 9
Dependent Claim
20 words
Porous pipe according to claim 2 in which the binder resin is selected from a polyolefin or a vinyl, resin.
Claim 10
Dependent Claim
13 words
Porous pipe according to claim 1 in which the polyolefin is a polyethylene.
Claim 11
Dependent Claim
15 words
Porous pipe according to claim 8 in which the polyethylene is a low density polyethylene.
Claim 12
Dependent Claim
16 words
Porous pipe according to claim 9 in which the polyethylene is a linear low density polyethylene.
Claim 13
Dependent Claim
22 words
Porous pipe according to claim 1 in which the ultraviolet stabilizer is selected from carbon black, phenols or amines or mixtures thereof.
Claim 14
Dependent Claim
13 words
Porous pipe according to claim 11 in which the stabilizer is carbon black.
Claim 15
Dependent Claim
24 words
Porous pipe according to claim 11 in which the stabilizer is present in an amount from 0.1 to 10% by weight of the pipe.
Claim 16
Dependent Claim
61 words
An extrudable composition for forming porous pipe comprising, from 60% to 70% by weight of discrete, vulcanized elastomer particles having a moisture content below about 0.5% by weight dispersed in a minor amount of thermoplastic binder resin selected from a polyolefin resin or a vinyl resin and 0.1 to 10% by weight of an ultraviolet stabilizer dispersed in said binder resin.
Claim 17
Dependent Claim
61 words
An extrudable composition for forming porous pipe comprising, from 60% to 70% by weight of discrete, vulcanized elastomer particles having a moisture content below about 0.5% by weight dispersed in a minor amount of thermoplastic binder resin selected from a polyolefin resin or a vinyl resin and 0.1 to 10% by weight of an ultraviolet stabilizer dispersed in said binder resin.
Claim 18
Dependent Claim
19 words
A composition according to claim 14 in which the binder resin is polyethylene and the stabilizer is carbon black.
Claim 19
Dependent Claim
30 words
A composition according to claim 15 in which the carbon black is predispersed in a carrier resin miscible with polyethylene containing 30 to 50 parts by weight of carbon black.
Claim 20
Dependent Claim
13 words
A composition according to claim 16 in which the carrier resin is polyethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |